"Core exceptions raised by the LedisDB client" class LedisError(Exception): pass class ServerError(LedisError): pass class ConnectionError(ServerError): pass class BusyLoadingError(ConnectionError): pass class TimeoutError(LedisError): pass class InvalidResponse(ServerError): pass class ResponseError(LedisError): pass class DataError(LedisError): pass class ExecAbortError(ResponseError): pass class TxNotBeginError(LedisError): pass